paid 14% in taxes last year on 13 million in income. >> obama wages war on coal. >> they blow everything out of proportion. >> reporter: in colorado alone, $47 million in five months have been spent by the romney and obama campaign. come november people here can tell the rest of the nation how they feel about enduring all those tv ads. >> let me get your e-mail address. >> reporter: amendment 65 is on the ballot. if passed the state's congressional delegation would be required to propose an amendment to the u.s. constitution limiting campaign contributions and spending. this is the executive director of colorado common cause. >> the result is a democracy that distorts the voice of ordinary people in favor of those who can write multimillion dollar expects. >> reporter: millionaires would argue they have the right to free speech as well. >> free spech protects what we say but it shouldn't be that we can scream louder than others. >> reporter: the 2010 ruling said restriction on contributions was restriction on free speech. a statement provided to cbs news warns what the colorado referendu